100 Proceedings of Royal Society of Edinburgh. [sess. 
We conclude from this, what might have been surmised a priori , 
that, apart from the disturbing influence of resonance, the partials of 
the glottal note tend to produce themselves in a descending scale of 
amplitude as they rise in pitch. No doubt there are individual 
differences — dull voices tapering down quickly, bright voices less 
quickly, shrill voices still less quickly, in amplitude of partials. 
With this compare, first of all, an analysis of long Dutch aa, spoken 
and analysed by Dr Boeke of Alkmaar (see Journal of Anat. and 
Phys., vol. xxxi. p. 248), pitch 175 v.d. 
Fig. 3. 
Then compare an analysis of Pipping’s Swedish (resembling French) 
i at 293 v.d. 
Fig. 4. 
Observe how the normal declining scale of amplitudes has been 
distorted by the specific resonances of the vowels. In fig. 3 there 
are two very clear reinforcements, the one culminating on the 5th 
partial, the other on the 7th and 8th. In fig. 4 two high reinforce- 
ments are also very visible, the one on the 7th and 8th, and the 
